Improved hand punching-machine



Anbed guaine pana can.

Leners Patna N 103,764, dated May 31, 1870.

The Schedule referred to in these Letters Patent and making part ofthe same.

To all whom it may concern Be it known that I, GARDNER C. MILLER, of Rockford, in the county of Winnebago and State of 1llinois, have invented a new and useful Improvement in 'Punching-Machines; and I do hereby declare that the following is a full and exact description of the same, reference being had to the accompanying drawing and to the letters of reference marked thereon.

This invention has for its object the production of a simple, compact, and powerful hand punching-machine.

lo enable others skilled in the art 'to make and use my invention, I will now proceed to fully describe its construction and operation.

A represents a base, ot' any proper form and size, which is provided with holes for the purpose ot` bolting it to a suitable foundation.

B B represent curving standards, which unite in the center, and. support the upright standards b b, as shown.

The parts B b are preferably constructed in a single piece, but they may becast separately if desired.

C represents a block, located between the standards b b, at their upper ends, and secured thereto by means of a bolt, as shown, which is provided with sockets c c, for the upper ends of the toggle-joints 'lhese joints, which consist of the two arms d d, have a similar attachment below as above, that is,

-the plunger E, in which they rest, is provided with The ends f f of the lever are connected to the tog.

gles by means of arms G G, the inner ends of which rest between the ends f j, and are bolted thereto, as shown. j

The outer ends are forked and secured to the toggles by thesame bolt that unites the arms d d. This fork is made suiciently long to permit the joint to. vbe adjusted, when desired to permit a longer thrust of the plunger.

vday of February, 187D.

H represents a stop, which is secured to the standard b by means of a set-screw, and adjusted in height by means of a slot, as shown.

lhe lower end of this rests upon the plate which is being perforated', and prevents it from rising with the punch. V

a represents the base-block, which is provided with a socket forl the reception otthe dies.

The lunoer E moves in an orifice in the standard, and is provided with suitable means for holding punches ot' dili'erent szes,`and also a slicar-bladc for cutting purposes. When this latter' is used, the baseblock illust be supplied, of course, with a corresponding blade.

The operation is as follows:

' rlhe handle of the level' is elevated, and the punch raised thereby. The metal tobe operated upon is now placed upon the base-plate, and the stop'H lowered until it rests upon it, in which position itis secured by the set-screw.

The lever is` now depressed and the punch forced through the plate. This operation is repeated indefinitely.

Each' upward movement of the lever raises the punch by throwing vont the toggle-joints by means of the arms connected to its T-shapcd head, and each downward movement depresses the punch by drawing in the toggle-joints.

.lhe block O is 'held lby a single bolt, in order that it may adjust itself to any unequal strain.

The described machine is simple in all its parts, is compact as a whole, and also possesses great power.

Having thus fully described my invention,

What I claim as new, and desire to secure by Letters Patent, is-

1. The improved machine, consisting essentially of the base A, standards B b, block G, arms d d, joints D D, plunger E, lever F, and arms G, when combined as described, for the purpose set forth.

2. The arrangement of the vibrating cap C, frame b b, and toggle-arms d (1 as described, for the purpose set forth.

This specification signed and witnessed this 15th GARDNER o. MILLER.

Witnesses:

G. W. Fono, A. H. MoKALLoR: 

